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Associate Principal Scientist, Downstream Process Development

Job in Rahway, Union County, New Jersey, 07065, USA
Listing for: Merck & Co.
Full Time position
Listed on 2026-05-28
Job specializations:
  • Engineering
    Research Scientist, Biotechnology
Salary/Wage Range or Industry Benchmark: 125000 - 150000 USD Yearly USD 125000.00 150000.00 YEAR
Job Description & How to Apply Below

Job Description

The Biologics Process Research & Development organization within our company's Research Laboratories is responsible for developing the drug substance manufacturing processes for our company's biologics pipeline. We work closely with colleagues in Discovery, Pre‑clinical and Early Development to rapidly develop manufacturing processes for biotherapeutics and efficiently manufacture material to supply clinical trials. We are also responsible for commercial process development and the development and implementation of new manufacturing technologies.

We work with our partners in the company's Manufacturing Division to commercialize and launch new products.

Job Overview

We are seeking a highly motivated and experienced individual to join our Downstream Process Development and Engineering group as an Associate Principal Scientist. In this role, you will work with a highly collaborative team of scientists and engineers to design and develop downstream purification processes in support of early and late‑stage biological products. The scope and activities include designing and optimizing downstream unit operations such as cell harvest, filtration, chromatography, viral clearance, precipitation, crystallization, and continuous processing for batch and intensified/continuous bioprocesses.

The role will also require effective organisational and multitasking skills and strong communication skills, both verbal and in presentation of data.

Responsibilities
  • Leading biologic downstream process development for first‑in‑human and commercial processes by efficiently developing high‑yield, robust and scalable processes. Independently designing and conducting experiments using relevant operational parameters and analytical inputs.
  • Providing technical supervision for process development and characterization.
  • Collaborating with upstream process development, Biologics Analytical R&D, and other cross‑functional teams in both Research and Manufacturing to advance the biologics pipeline.
  • Advancing downstream platform process technical strategy, and championing creative process improvement initiatives.
  • Assessing new technologies, sciences, and industry strategies and relevance to our company.
  • Collaborating with academia, industry partners, and vendors to drive development, innovation and adoption of new process technologies.
  • Keeping up to date with the external patent and literature environment; actively presenting and publishing externally and pursuing patenting strategies.
  • Mentoring junior scientists.
Education Requirements
  • Ph.D. with 3+ years of industry experience or Master with 6+ years industry experience or BS with 8+ years in industry experience in Chemical Engineering, Biochemical engineering, or a related field.
Required Skills
  • Proven record of accomplishments in downstream process and technology development with a scientific publication and presentation track record.
  • Scientific understanding of the engineering principles for recombinant protein purification unit operations. Proven ability to design and execute protein purification experiments independently.
  • Ability to direct the planning, execution, analysis, and documentation of all stages of downstream process development.
  • Ability to work in a matrixed team environment and collaborate with both internal and external partners including vendors.
  • Knowledge of biologics CMC development cycle.
  • Demonstrated ability to take initiative, creativity, and innovation in problem solving.
Preferred Skills
  • Experience with high‑throughput experimentation using automation platforms such as TECAN.
  • Experience using and/or programming process control systems such as Delta

    V and PCS 7.
  • Experience with integrated and continuous processing and equipment including multi‑column chromatography systems (BioSMB, PCC, or similar).
  • Background or experience in data science approaches related to downstream processes and predictive modeling (multivariate data analysis, machine learning/artificial intelligence, leveraging PAT).
Salary

Salary range: $ – $. This is the lowest to highest salary we in good faith believe we would pay for this role at the time of posting. An employee's position within the…

Position Requirements
10+ Years work experience
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